UI Theme Randomizer

Sometimes the best way to get unstuck is to let a generator surprise you. This UI Theme Randomizer proposes complete color themes—primary, secondary, accent, background, surface, and text—using sensible ranges that encourage contrast and balance. You can lock any token you like, then re-roll the rest until something clicks. It is a fast way to explore directions for a brand refresh, a component library spike, or a hackathon project. While randomness is at play, the generator nudges outcomes toward accessible combinations by constraining lightness and saturation for text tokens.

The live tool below runs entirely on the client and exposes copy-ready CSS variables and JSON token exports. Integrate them into your design system, map tokens to Tailwind, or wire them into a theme switcher prototype. If you prefer hands-on control over a single color, start with the HSL Color Picker and graduate to the Dark Mode Palette Builder when you want coordinated, theme-wide adjustments.

How the randomization works

For accent and primary tokens, hue is sampled broadly while saturation stays in a mid-to-high band to ensure vibrancy. Background and surface tokens bias toward higher lightness in light themes, and lower in dark themes, with low saturation to avoid color noise. Text tokens anchor near the extremes of lightness to preserve legibility. The result is not a guarantee of WCAG compliance, but a reasonable starting point you can refine with the Contrast Checker and Accessible Font Size Checker.

Live UI Theme Randomizer

Lock any color token, adjust hue/saturation/lightness bounds, and generate new combinations. When you land on something promising, copy the variables into your project and iterate from there.

:root{
  --color-primary: hsl(116, 61%, 56%);
  --color-secondary: hsl(150, 32%, 67%);
  --color-accent: hsl(333, 57%, 62%);
  --color-background: hsl(116, 6%, 96%);
  --color-surface: hsl(116, 6%, 98%);
  --color-text: hsl(116, 6%, 8%);
}

{
  "primary": "hsl(116, 61%, 56%)",
  "secondary": "hsl(150, 32%, 67%)",
  "accent": "hsl(333, 57%, 62%)",
  "background": "hsl(116, 6%, 96%)",
  "surface": "hsl(116, 6%, 98%)",
  "text": "hsl(116, 6%, 8%)"
}

Related tools to refine results

To shape a rough idea into a production-ready theme, lean on the Color Tokens Generator, Palette Exporter, and Real-Time Theme Preview Sandbox. If typography is part of your exploration, try the Typography Pairing Tool to harmonize type with your new palette.